April weather forecastCupertino, CA
April
Weather in April
April, like March, in Cupertino, California, is another comfortable spring month, with temperature in the range of an average low of 46°F (7.8°C) and an average high of 65.7°F (18.7°C).Temperature
Cupertino, California, commences April with an average high-temperature of a still refreshing 65.7°F (18.7°C), maintaining a close resemblance to the previous month. Cupertino records an average low-temperature of 46°F (7.8°C) throughout the month of April.Humidity
The average relative humidity in April in Cupertino is 70%.Rainfall
In Cupertino, during April, the rain falls for 5.5 days and regularly aggregates up to 0.31" (8mm) of precipitation. In Cupertino, during the entire year, the rain falls for 53.6 days and collects up to 5.39" (137mm) of precipitation.Daylight
The average length of the day in April is 13h and 11min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:31 pm. On the last day of April, sunrise is at 6:13 am and sunset at 7:57 pm PDT.
Sunshine
In Cupertino, the average sunshine in April is 10.4h.UV index
In April, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index, 5 during April, leads to the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Cupertino, CA
- Average high temperature in April: 65.7°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (57°F).
- Average low temperature in April: 46°F
The month with the highest average low temperature is August (56.1°F).
The coldest months (with the lowest average low temperature) are February and March (44.2°F).
Average pressure in April
Cupertino, CA
- Average pressure in April: 30.04"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in April
Cupertino, CA
- Average wind speed in April: 6.2mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is September (4.6mph).
Average humidity in April
Cupertino, CA
- Average humidity in April: 70%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July, September and October (64%).
Average rainfall in April
Cupertino, CA
- Average rainfall in April: 0.31"
The wettest month (with the highest rainfall) is February (1.02").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in April
Cupertino, CA
- Average rainfall days in April: 5.5 days
The month with the highest number of rainy days is March (9 days).
The month with the least rainy days is August (0.8 days).
Average daylight in April /
Average sunshine in April
Cupertino, CA
- Average daylight in April: 13h and 12min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 10h and 24min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in April
Cupertino, CA
- Average sunshine days in April: 24 days
The month with the most sunshine days is August (28.5 days).
The months with the least sunshine days are February and March (20.8 days).
Average UV index in April
Cupertino, CA
- Average UV index in April: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in April
Cupertino, CA
- Average cloud cover in April: 26
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in April
Cupertino, CA
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
